CN110170377A - A kind of sorting consumer waste technique and household garbage sorting system - Google Patents

Abstract

The invention discloses a domestic garbage sorting process, which comprises the steps of large-scale sorting of domestic garbage, bag breaking treatment of domestic garbage, primary garbage sorting, fine garbage sorting, and fine organic matter sorting, which are carried out in sequence. The invention also discloses a household garbage sorting system, which includes a large-size sorting table, a garbage storage pit, a bag breaking machine, a first manual sorting room, a first magnetic separation device, a secondary Drum sieve, second manual sorting room, organic matter fine sorting system and plastic baler. The present invention separates domestic garbage according to their respective differences through the combination of screening device and manual sorting, so as to realize the effective separation of all components of garbage; at the same time, the sorted organic matter is subdivided, and the obtained organic matter raw material has high purity, The efficiency of organic matter production is improved, which is beneficial to the subsequent resource utilization of organic matter fermentation, and fully recovers the available resources in the garbage.

Description

A domestic waste sorting process and a domestic waste sorting system

technical field

The invention relates to the technical field of domestic waste sorting, in particular to a domestic waste sorting process and a domestic waste sorting system using the process.

Background technique

At present, domestic and foreign domestic waste treatment technologies all aim at harmlessness, reduction, and recycling. The most commonly used treatment methods are landfill, incineration and composting, each of which has a different range of use and conditions. The primary task of recycling domestic waste is to effectively sort domestic waste, realize the classification of each component in the waste, and then lay a strong foundation for the realization of recycling and utilization of various substances, but in reality there is no such thing as Realize the purpose of recycling all domestic waste. There are many reasons for this, but the main reason is that there is no systematic, reliable, and practical sorting technology, which is mainly manifested in: some garbage sorting facilities are simple in configuration, poor in sorting effect, and low in recovery rate. Due to the poor sorting effect, most of the sorted products cannot be recycled or used as raw materials for further processing, so they have to be sent to landfills for landfill or incineration.

Contents of the invention

The object of the present invention is to overcome the defects in the prior art and provide a household garbage sorting process and a household garbage sorting system with simple procedures and more thorough and detailed household garbage sorting.

In order to achieve the above object, the technical solution of the present invention is to design a sorting process of domestic waste, comprising the steps of:

S1: For large-scale sorting of domestic waste, the domestic waste is first transported to the sorting workshop by municipal waste collection vehicles, and the large-scale textiles, wood boards, rubber, stones, paper, cartons, Large pieces of plastic and glass bottles with a size greater than 1 meter are sorted out, and then the sorted materials are sorted and stacked;

S2: Household garbage bag breaking treatment, push the large-sized sorted household garbage into the garbage storage pit for storage, and collect leachate, and then send the domestic garbage in the garbage storage pit to the bag breaking machine through the transport device for bag breaking;

S3: Preliminary sorting of garbage. The domestic garbage after the bag is broken is sorted manually, and the glass bottles, beverage bottles and rubber missed in the large-size sorting process are further sorted out; the remaining parts are sorted out by magnetic separation. Subdivision selection process;

S4: Garbage fine selection, the domestic garbage after the primary sorting is screened by the integrated secondary drum sieve, and three kinds of materials are selected, respectively, 1) the sand and gravel soil under the primary sieve, 2) the secondary Organic matter under the sieve, broken plastics not larger than the aperture of the secondary sieve, empty beverage bottles/boxes not larger than the aperture of the secondary sieve, 3) the size of the sieve on the secondary sieve is larger than that of the secondary sieve Whole pieces of plastic, large pieces of organic matter, stones and glass vials;

S5: The material on the secondary sieve in step S4 is manually sorted again, and the large organic matter, stones, and glass bottles are further sorted and stacked, and the remaining plastic parts are sent to a plastic baler for packaging;

S6: Finely select organic matter, send the material under the secondary sieve in step S4 to the integrated bouncing sieve for bouncing and winnowing to perform synchronous bouncing and winnowing screening, and then sort out the organic matter under the bouncing sieve again. The shredded plastics and empty beverage bottles/boxes collected by bouncing are sorted and stacked.

The present invention combines automatic equipment and manual sorting to separate domestic garbage one by one according to their differences, and sorts out plastics, textiles, building materials, paper, metals, and organic substances. Effective separation of all components of garbage; then the sorted materials are sorted and stacked, which is conducive to the recycling of subsequent materials, or regeneration into new products, and can recycle, process and recycle all domestic garbage, turning waste into treasure , can maximize the creation of economic, environmental and social benefits; at the same time, the organic matter is subdivided by combining manual sorting and bouncing winnowing integrated bouncing sieve, the obtained organic raw materials are of high purity, and the organic matter production rate is improved , which is conducive to the subsequent resource utilization of organic matter fermentation, and fully recovers the available resources in the garbage.

A further preferred technical solution is to further include mixing and crushing the bulk organic matter sorted in step S5 and the organic matter sorted out in step S6, putting them into the organic matter storage bin for stacking, and then entering the fermentation system for fermentation and reuse. The sorted organic materials are first crushed, and then enter the fermentation system for fermentation to reduce the particle size of the organic matter, increase the surface area of the organic matter, increase the contact area between the organic matter and the fermentation strain or fermentation liquid, and improve the fermentation efficiency. Part of the organic matter produced is more thoroughly utilized, providing more energy products for the society, and effectively solving the problems of high recycling cost, low utilization rate, difficult separation and waste of resources for domestic waste.

The present invention also designs a domestic garbage sorting system, which includes a large-size sorting table, a garbage storage pit, a bag breaking machine, a first manual sorting room, a first magnetic separation device, a secondary Drum sieve, the second manual sorting room and plastic baler; the secondary drum sieve is also connected with an organic matter fine selection system through an organic matter conveying belt conveyor, and the organic matter fine selection system includes a device connected with the secondary drum sieve The first organic matter conveying belt conveyor is connected with the first organic matter conveying belt conveyor, and the integrated bouncing sieve for bouncing winnowing is connected with the second organic matter conveying belt conveyor arranged between the second manual sorting room and the organic matter crusher. The third organic matter conveying belt conveyor and the fourth organic matter conveying belt conveyor connected between the integrated bouncing screen for bouncing wind selection, organic matter crusher, and organic matter storage bin are set between the integrated bouncing screen for bouncing air separation and the plastic baler Shredded Plastic Conveyor Belt Conveyor. The domestic garbage sorting system provided by the invention has compact and simple structures and is easy to implement.

The preferred technical solution is that the secondary trommel screen is composed of a first screening section and a second screening section, and the sieve plate aperture of the first screening section is smaller than the sieve plate aperture of the second screening section; A first funnel hopper and a second funnel hopper are provided below the section and the second screening section respectively. The integrated secondary drum screen sets the first screening section and the second screening section through different apertures, which can screen materials of different sizes at one time, reducing the setting of multiple screening machines and multiple screening machines The transfer of materials between them makes the sorting process more compact.

A further preferred technical solution is that a gravel soil belt conveyor is provided below the first funnel hopper; a first organic matter conveying belt conveyor is arranged under the second funnel hopper, and the first organic matter conveying belt conveyor A second magnetic separation device is arranged above the conveyor belt. The organic matter screened by the drum sieve is subjected to magnetic separation again to remove the magnetic metal in the organic waste, and more metal materials that can be reused can be separated, and the purity of the organic matter is also improved. Further preferably, the gravel soil belt conveyor is connected with a gravel soil crusher. Set up a gravel crusher to crush the gravel and then mix it as raw materials for brick making to avoid uneven mixing of different gravel and soil, resulting in uneven distribution of the bricks, reducing the structural stress of the bricks, and further Affect the firmness and safety of subsequent buildings.

A further preferred technical solution is that the integrated bouncing screen for bouncing and winnowing is an inclined bouncing screen, and the air outlet of the air supply device of the integrated bouncing screen for bouncing and winnowing is located at the low end side of the inclined screen surface and faces the inclined screen. The high-end side of the screen surface is higher than the screen surface; the high-end side of the bouncing winnowing integrated bouncing screen is lower than the screen with an annular collection box. When the material is bouncing on the screen surface, the air supply device blows light wind to blow the broken plastic pieces to the edge of the high-end side of the bouncing screen surface, collects them and sends them to the conveyor belt conveyor, and merges with the plastic on the secondary trommel screen. , packed together by a plastic baler and transported by a forklift to the plastic processing workshop as raw materials for making plastic granules or for sale; the high-end side of the bouncing screen is lower than the screen, and there is also a small empty beverage bottle/box. The collected ring-shaped collection box prevents empty beverage bottles/boxes from being scattered on the ground around the bouncing screen, which increases the labor intensity of workers. The ring-shaped collection box is only set near the high-end side of the bouncing screen, and is not connected with the bouncing screen, and does not vibrate up and down with the bouncing screen, so as to prevent the empty beverage bottles/boxes collected by the collection box from jumping out of the collection again with the vibration of the bouncing screen box.

A further preferred technical solution is that the air supply device includes a blower or an external air supply source, and the air outlet of the blower or the external air supply source is connected to the double-louver direction-adjusting air distributor through a pipe, and the double-louver adjuster The width of the air distributor is adapted to the width of the screen. The width of the double louver adjustable air distributor is adapted to the width of the screen, which can increase the air supply area, and can blow the broken plastic on the screen surface of the bouncing screen to the high-end edge of the inclined screen with maximum efficiency, which is convenient for crushing Separation and collection of plastics.

A further preferred technical solution is that the head roller of the third organic matter conveying belt conveyor is a magnetic roller device. The organic matter screened out by the bounce sieve is subjected to magnetic separation again to further remove the magnetic metal in the organic matter, which can separate more metal materials that can be reused, and also improve the purity of the organic matter and protect the organic matter crusher to avoid Metal materials damage the organic matter crusher.

A further preferred technical solution is that the garbage storage pit and the bag breaking machine are connected by a bridge grab crane and a chain plate feeder for the transfer of garbage materials, and the chain plate feeder is connected to the bag breaking machine. A distributing machine is arranged between the machines, and the transfer connection of materials is carried out between the distributing machine and the first manual sorting room through a garbage conveying belt conveyor. A distributing machine is set between the chain plate feeder and the bag breaking machine, so that the bagged garbage transported by the crane enters between the bag breaking machines for uniform distribution, avoiding the blockage of the bag breaking machine and affecting the work of the bag breaking machine, while the uniformity of the distributing machine The cloth can make the garbage after the broken bags spread out in a large area and low thickness on the garbage conveyor belt conveyor, which is convenient for subsequent manual sorting, improves the speed of manual sorting, and separates the materials that need manual sorting as much as possible, so that the garbage sorting more complete and detailed.

In a further preferred technical solution, the organic matter storage bin is connected to the feeding device of the biogas fermentation system through a conveyor belt conveyor, and a leachate collection pool connected through a trench is set in the garbage storage pit, and the leachate collection pool is connected through a pipeline It is connected with the feeding device of the biogas fermentation system, and an output pump is set on the pipeline. The sorted organic matter and the collected leachate containing organic matter are fermented with biogas, and the crushed organic matter can be treated with a temperature-controlled anaerobic fermentation process, which can effectively kill insect eggs and grass seeds in the organic matter. substance. During the fermentation process, while biogas is produced, high-quality biogas residues can also be produced, which lays a strong foundation for the subsequent production of organic fertilizers.

The advantages and beneficial effects of the present invention are: the domestic waste sorting process provided by the present invention is combined with automatic screening equipment and manual sorting, so that the domestic waste can be classified more thoroughly and meticulously; Separation one by one, sort out plastics, textiles, building materials, paper, metal, organic matter, realize the effective separation of all garbage components, and then effectively use; at the same time, the sorted organic matter is also subdivided to obtain the purity of organic matter raw materials High, which improves the production rate of organic matter, which is conducive to the subsequent resource utilization of organic matter fermentation, and fully recovers the available resources in garbage; the sorted organic matter materials are first crushed, and then enter the fermentation system for fermentation, reducing the waste of organic matter Granularity, increase the surface area of organic matter, increase the contact area between organic matter and fermentation strains or fermentation liquid, improve fermentation efficiency, make the use of sorted organic matter more thorough, provide more energy products for the society, and effectively solve the problem of domestic waste recycling The use cost is high, the utilization rate is low, it is not easy to separate, and the waste of resources is a problem; the structure of each component of the domestic waste sorting system provided by the present invention is compact and simple, and it is easy to realize; the integrated secondary drum screen can separate materials of different sizes at one time Screening reduces the setting of the screening machine and the transfer of materials between the screening machines, making the sorting process more compact; the organic matter screened by the drum sieve is subjected to magnetic separation again to remove the magnetic metal in the organic waste, More metal materials that can be reused can be separated, and the purity of organic matter is also improved; the bouncing screen is equipped with an air supply device, and when the material is bouncing on the screen surface, the air supply device blows light wind to blow the broken plastic pieces to The upper end of the bouncing sieve is collected and sent to the conveyor belt conveyor, where it merges with the plastic on the secondary drum sieve, packed by a plastic baler, and then transported to the plastic processing workshop by a forklift as raw material for making plastic granules or for sale abroad; bouncing sieve The high-end side of the high-end side is lower than the screen, and there is also an annular collection box that can collect empty beverage bottles/boxes, so as to prevent beverage bottles/boxes from being scattered around the bouncing screen and increase the labor intensity of workers; chain plate feeder and A distributing machine is installed between the bag breaking machines, so that the bagged garbage transferred by the crane enters between the bag breaking machines for uniform distribution, avoiding the blockage of the bag breaking machine and affecting the work of the bag breaking machine. At the same time, the uniform distribution of the distributing machine can make the bag breaking The final garbage is spread out in a large area and low thickness on the garbage conveyor belt conveyor, which is convenient for subsequent manual sorting, improves the speed of manual sorting, and separates the materials that need manual sorting as much as possible, so that the garbage sorting is more complete and detailed ; The sorted organic matter and the collected leachate containing organic matter can be processed through the anaerobic fermentation process with temperature control in the biogas fermentation process, which can effectively kill insect eggs and grass seeds in the organic matter and other harmful substances. During the fermentation process, while biogas is produced, high-quality biogas residues can also be produced, which lays a strong foundation for the subsequent production of organic fertilizers; the invention realizes the effective separation of domestic garbage, and finally uses and processes them all into products, without any difference Secondary pollution, zero incineration, zero landfill, zero discharge, truly realize resourceful, harmless and efficient utilization.

Description of drawings

Fig. 1 is the flow chart of house refuse sorting process of the present invention;

Fig. 2 is a schematic structural diagram of the domestic waste sorting system of the present invention.

In the figure: 1. Large-size sorting table; 2. Garbage storage pit; 3. Bridge grab crane; 4. Chain plate feeder; 5. Distributor; 6. Bag breaker; 7. First garbage conveyer Belt conveyor; 8. The first manual sorting room; 9. The first magnetic separation device; 10. Secondary drum screen; 11. The second manual sorting room; 12. Plastic baler; 13. The first organic material conveying belt conveyor ; 14. Bounce winnowing integrated bouncing screen; 15. The second organic matter conveying belt conveyor; 16. Organic matter crusher; 17. Organic matter storage bin; 18. The third organic matter conveying belt conveyor; 19. The fourth organic matter conveying belt conveyor ;20, broken plastic conveyor belt conveyor; 21, gravel soil belt conveyor; 22, the second magnetic separation device; 23, collection box; 24, magnetic drum device; 25, the second garbage conveyor belt conveyor; 26, the first Funnel hopper; 27, the second funnel hopper; 28, blower.

Detailed ways

The specific implementation manners of the present invention will be further described below in conjunction with the drawings and examples. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

As shown in Fig. 1, 2, the present invention is a kind of house refuse sorting process, comprises the following steps:

S1: For large-scale sorting of domestic waste, the domestic waste is first transported to the sorting workshop by municipal waste collection vehicles, and the large-scale textiles, wood boards, rubber, stones, paper, cartons, Large pieces of plastic and glass bottles with a size greater than 1 meter are sorted out, and then the sorted materials are sorted and stacked;

S2: Household garbage bag breaking treatment, push the large-sized sorted household garbage into the garbage storage pit for storage, and collect leachate, and then send the domestic garbage in the garbage storage pit to the bag breaking machine through the transport device for bag breaking;

S3: Preliminary sorting of garbage. The domestic garbage after the bag is broken is sorted manually, and the glass bottles, beverage bottles and rubber missed in the large-size sorting process are further sorted out; the remaining parts are sorted out by magnetic separation. Subdivision selection process;

S4: Garbage fine selection, the domestic garbage after the primary sorting is screened by the integrated secondary drum sieve, and three kinds of materials are selected, respectively, 1) the sand and gravel soil under the primary sieve, 2) the secondary Organic matter under the sieve, broken plastics not larger than the aperture of the secondary sieve, empty beverage bottles/boxes not larger than the aperture of the secondary sieve, 3) the size of the sieve on the secondary sieve is larger than that of the secondary sieve Whole pieces of plastic, large pieces of organic matter, stones and glass vials;

S5: The material on the secondary sieve in step S4 is manually sorted again, and the large organic matter, stones, and glass bottles are further sorted and stacked, and the remaining plastic parts are sent to a plastic baler for packaging;

S6: Finely select organic matter, send the material under the secondary sieve in step S4 to the integrated bouncing sieve for bouncing and winnowing to perform synchronous bouncing and winnowing screening, and then sort out the organic matter under the bouncing sieve again. The shredded plastics and empty beverage bottles/boxes collected by bouncing are sorted and stacked;

S7: The bulk organic matter sorted in step S5 and the organic matter sorted in step S6 are mixed and crushed, and then put into the organic matter storage bin for stacking, and then enter the fermentation system for fermentation and reuse. Wherein, the particle size of the crushed organic matter is 15-25mm.

The present invention also provides a household garbage sorting system, which includes a large-size sorting table 1, a garbage storage pit 2, a bag breaking machine 6, a first manual sorting room 8, a first magnetic separation Device 9, secondary drum sieve 10, the second manual sorting chamber 11 and plastic baler 12; described secondary drum sieve is also connected with organic matter fine separation system by organic matter conveying belt conveyor, and described organic matter fine matter separation system Including the first organic matter conveying belt conveyor 13 connected with the secondary drum screen, the bouncing winnowing integrated bouncing screen 14 connected with the first organic matter conveying belt conveyor, connected and arranged in the second manual sorting room and the organic matter crusher 16 The second organic matter conveying belt conveyor 15 between is connected successively between the 3rd organic matter conveying belt conveyer 18 and the 4th organic matter conveying belt conveyer 19 between the bouncing winnowing integrated bouncing screen, the organic matter crusher, the organic matter storage bin, set The crushed plastic conveyor belt conveyor 20 between the bouncing winnowing integrated bouncing screen and the plastic baler.

The secondary drum screen is composed of a first screening section and a second screening section, the sieve plate aperture of the first screening section is smaller than the sieve plate aperture of the second screening section; the first screening section and the second screening section A first funnel hopper 26 and a second funnel hopper 27 are respectively provided below the section.

The below of described first funnel hopper is provided with gravel soil belt conveyor 21; The second magnetic separation device 22.

The integrated bouncing screen 14 of the bouncing and winnowing type is an inclined bouncing screen, and the air outlet of the air supply device of the integrated bouncing screen for bouncing and winnowing is located at the low end side of the inclined screen surface, and faces the high end side of the inclined screen surface. Higher than the screen surface; the high-end side of the bouncing winnowing integrated bouncing screen is provided with an annular collection box 23 below the screen. The air supply device includes a blower 28 or an external air supply air source, and the air outlet of the blower or the external air supply air source is connected to the double-louver air distributor through a pipeline, and the double-louver air distributor is adjusted to the width of the air distributor. Compatible with screen width. This can improve the winnowing efficiency of the broken plastics, so that the broken plastics can be separated and concentrated in the ring-shaped collection box 23 of the screen for easy collection.

The head drum of the third organic matter conveying belt conveyor is a magnetic drum device 24 .

The garbage storage pit and the bag breaking machine are connected by bridge grab crane 3 and chain plate feeder 4 for transfer of garbage materials, and the chain plate feeder and the bag breaking machine are set Distributing machine 5, between the said distributing machine and the first manual sorting room, carry out the transfer connection of materials through the first garbage conveying belt conveyor 7, and the secondary drum screen passes through the second garbage conveying belt conveyor 25 and the second manual sorting room Material transfer between.

The organic matter storage bin 17 is connected to the feeding device of the biogas fermentation system through a conveyor belt conveyor, and a leachate collection pool connected by a ditch is arranged in the garbage storage pit, and the leachate collection pool is connected to the biogas fermentation system through a pipeline. The feeding device is connected, and an output pump is arranged on the pipeline.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, some improvements and modifications can also be made. These improvements and modifications It should also be regarded as the protection scope of the present invention.

Claims (10)

1. A domestic waste sorting process is characterized in that, comprises the steps: S1: For large-scale sorting of domestic waste, the domestic waste is first transported to the sorting workshop by municipal waste collection vehicles, and the large-scale textiles, wood boards, rubber, stones, paper, cartons, Large pieces of plastic and glass bottles with a size greater than 1 meter are sorted out, and then the sorted materials are sorted and stacked; S2: Household garbage bag breaking treatment, push the large-sized sorted household garbage into the garbage storage pit for storage, and collect leachate, and then send the domestic garbage in the garbage storage pit to the bag breaking machine through the transport device for bag breaking; S3: Preliminary sorting of garbage. The domestic garbage after the bag is broken is sorted manually, and the glass bottles, beverage bottles and rubber missed in the large-size sorting process are further sorted out; the remaining parts are sorted out by magnetic separation. Subdivision selection process; S4: Garbage fine selection, the domestic garbage after the primary sorting is screened by the integrated secondary drum sieve, and three kinds of materials are selected, respectively, 1) the sand and gravel soil under the primary sieve, 2) the secondary Organic matter under the sieve, broken plastics not larger than the aperture of the secondary sieve, empty beverage bottles/boxes not larger than the aperture of the secondary sieve, 3) the size of the sieve on the secondary sieve is larger than that of the secondary sieve Whole pieces of plastic, large pieces of organic matter, stones and glass vials; S5: The material on the secondary sieve in step S4 is manually sorted again, and the large organic matter, stones, and glass bottles are further sorted and stacked, and the remaining plastic parts are sent to a plastic baler for packaging; S6: Finely select organic matter, send the material under the secondary sieve in step S4 to the integrated bouncing sieve for bouncing and winnowing to perform synchronous bouncing and winnowing screening, and then sort out the organic matter under the bouncing sieve again. The shredded plastics and empty beverage bottles/boxes collected by bouncing are sorted and stacked. 2. The domestic waste sorting process according to claim 1, further comprising mixing and crushing the bulk organic matter sorted out in step S5 and the organic matter sorted out in step S6 and entering the organic matter storage bin Stacked, and then enter the fermentation system for fermentation and reuse. 3. A system for sorting household garbage according to the household garbage sorting process according to claim 1, characterized in that, it includes a large-size sorting table, a garbage storage pit, a bag breaker, a first A manual sorting room, a first magnetic separation device, a secondary drum screen, a second manual sorting room and a plastic baler; the secondary drum screen is also connected with an organic matter fine-separation system through an organic matter conveying belt conveyor, so The fine organic matter separation system includes the first organic matter conveying belt conveyor connected with the secondary trommel screen, the integrated bouncing sieve connected with the first organic matter conveying belt conveyor, and the integrated bouncing screen connected with the second manual sorting room and The second organic matter conveying belt conveyor between the organic matter crushers is sequentially connected to the third organic matter conveying belt conveyor and the fourth organic matter conveying belt conveyor between the bouncing winnowing integrated bouncing screen, the organic matter crusher, and the organic matter storage bin. Crushed plastic conveyor belt conveyor between the bouncing winnowing integrated bouncing screen and plastic baler. 4. The domestic waste sorting system according to claim 3, wherein the secondary drum screen is composed of a first screening section and a second screening section, and the sieve plate aperture of the first screening section is smaller than that of the second screening section. Aperture of the sieve plate of the second screening section; a first funnel hopper and a second funnel hopper are respectively arranged under the first screening section and the second screening section. 5. The domestic waste sorting system according to claim 4, characterized in that, a gravel soil belt conveyor is provided below the first funnel hopper; a first organic matter conveyer is provided below the second funnel hopper Belt conveyor, a second magnetic separation device is arranged above the conveyor belt of the first organic matter conveying belt conveyor. 6. The domestic waste sorting system according to claim 5, wherein the integrated bouncing screen for bouncing and winnowing is an inclined bouncing screen, and the air outlet of the air supply device for the integrated bouncing screen for bouncing and winnowing It is located on the low end side of the inclined screen surface, and is facing the high end side of the inclined screen surface and is higher than the screen surface; the high end side of the integrated bouncing screen for bouncing wind separation is lower than the screen mesh and is provided with an annular collection box. 7. The domestic waste sorting system according to claim 6, wherein the air supply device includes a blower or an external air supply source, and the air outlet of the blower or the external air supply source passes through a pipe and double louvers The direction-adjusting air distributor is connected, and the width of the double-louver direction-adjusting air distributor is adapted to the width of the screen. 8. The household garbage sorting system according to claim 7, characterized in that, the head roller of the third organic matter conveying belt conveyor is a magnetic roller device. 9. The domestic waste sorting system according to claim 8, characterized in that, the garbage storage pit and the bag breaking machine are connected by bridge type grab crane and chain plate feeder for transfer of waste materials A distributing machine is arranged between the chain plate feeder and the bag breaking machine, and the transfer connection of materials is carried out between the distributing machine and the first manual sorting room through a garbage conveyor belt conveyor. 10. The domestic waste sorting system according to any one of claims 3-9, wherein the organic matter storage bin is connected to the feeding device of the biogas fermentation system through a conveyor belt conveyor, and the waste storage pit is provided with The leachate collection tank connected by the ditch is connected with the feeding device of the biogas fermentation system through a pipeline, and an output pump is arranged on the pipeline.